New Pattern: aws-codecommit-codepipeline

Build a new pattern to use AWS CodeCommit as source for AWS CodePipeline. Also create AWS EventBridge event rule using the pipeline as target for a commit on defined git branch.

### Use Case

Need this feature to invoke AWS CodePipeline once new code is committed on a defined branch.

### Proposed Solution

Create a CodePipeline, CodeCommit repository, event rule with CodePipeline as the target.

* [X] :wave: I may be able to implement this feature request
* [ ] :warning: This feature might incur a breaking change

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This is a :rocket: Feature Request

No file, test, or entry point is named. Start by inspecting comparable AWS CDK patterns in the aws-solutions-constructs repository, then identify how to represent CodeCommit, CodePipeline, and an EventBridge rule targeting the pipeline. Done means a pattern supports commits on a defined Git branch and has coverage for the proposed resources.

Written by the indexing model from the issue text.